Power charging device for concrete-mixers.



E. B. SYMONS.

POWER CHARGING DEVICE FOR CONCRETE MIXERS.

APPLICATION FILED OUT. 17, 1908.

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POWER CHARGING DEVICE FOR CONCRETE MIXERS.

APPLICATION TILED 0CT.17, 1908.

Patented Sept. 14,1909.

2 SHEETS-SHEET 2.

vwento'r,

UNITED STATES PATENT OFFICE.

EDGAR B. SYMONS, 0F MILWAUKEE, WISCONSIN, ASSIGNOR TO THE '1. L, SMITH COMPANY, MILWAUKEE, WISCONSIN, A CORPORATION OF WISCONSIN.

. POWER CHARGING DEVICE FOR CONCRETE MIXERS.

Specification of Letters Patent. Patented 14, 1909.

Application filed October 17, 1908. Serial No. 456,160.

- receive one complete batch of material to be mixed at the floor level while the preceding batch is'being mixed in the mixer, and that will elevate the batch and discharge it into the mixer in one short operation. By this means the mixing action is practically continuous, and all the expense of platforms and wheelbarrow runways, and all the labor of elevating by hand the stone, sand, gravel and cement to the height of the feed spout,

i's obviated. 2 5

Another object is to obviate all unnecessary friction of ropes pulling at disadvantagpous angles,I by pivoting the over head ame so that the lead of the ropes is always fair.

Another object is to render the device readily detachable from the mixer and readily segregable into component parts, so that it may be as readily r-table as possible.

I attain these ob ects by the mechanism illustrated in the accompanying drawings, in which,

Figure 1 is a side elevation of the device, showlng the loading bucket on the ground in osition to receive the batch of material, an. also showing, in dotted lines, the. buc'ket in elevated position discharging into the mixer spout. Fig. 2 is an end view of the device looking from the right of Fig. 1, the bucket and frame being shown in section on the plane AB, Fig. 1. Fig. 3 shows a side view of the discharge end of the bucket the loading 'end being broken away. Fig. 4 showsa side view of the attachment of the connection with any batch mixer, the mixer herein shown is of the well known ty e illustrated and described in Patent 1 b.

690,783 dated Smith. I

It will be sufiicient description of the mixer-to say that a is thev feed spout into which the loadin device discharges, and 66 are the truck-ti rs on which the mixer is mounted.

The loader bucket c is constructed of sheet steel, and the part from c to 0" is open on top, so that barrow loads of sand, stone and gravel may be readily dumped At (2 the bucket is provided with a spout or chute having a ate d hinged to-the top of the bucket at and a spring latch e hinged below the spout d at e: The pivot in'at c has a torsion spring on it, tending to hold the latch closed.

The bucket c has radius arms f riveted to its sides and pivoted to the mixer by means J an. 7th, 1902, issued to T. L.

' of the pivot ,pin f and the cast bracket bolted to the timber I). These pivot pins are secured in place by easily removable spring cotters, so that by removing these ootters and ul-li-ng out the pivot pins, the loader buc et is disconnected from the'mixer.

The loader bucket has riveted transversely of its top surface,'two an le irons hh spaced apart to receive between t em the links Icicle, said links being pivoted :to the .bars by pins 11. Three straps or hangers mmm are pivoted to the links kby pins m. Three sheaves mm are hung in the strap m. and by virtue of the double pivotin these sheaves can aline themselves to a pul in any direction.

A frame having two main sills 00, is attached to the mixer by ivot pins 0 connect" ing the two cast brac ets g and g.. The frame 00 lies on the ground positioned by its connection with the mixer. Opposite. the sheaves on the loading bucket, two cast brackets pp are bolted to the sills 00 and a swinging gallows framegg is pivoted in slots 7 -in p. The slots 1) are provided so that the frame gq may be disconnected from the. ground frame by merely lifting the frame with its pivot pins p until they are clear of the slots p.

The vertical members of the swinging frame 9 are made of channels so there is a flange on each side of the upright as at g Figs. 5 and 6. At each end of the angle irons hh a bracket h is riveted, each such bracket carrying a roller h traveling in the upright channel between qg'. As the caror bucket 0 is elevated, itpivotsi around its center f and its rollers hf traveling in the channels swing the frame 9 around its pivots 1). When the bucket 0 starts its upward movement the pull on the liftin ropes is normal to the radius bars f, and w en the bucket is at the top of its travel, the strain on the ropes is in a direction makin an angle of Iabout 30 degreesto the norma to the radius ars.

The hoisting drum H is driven from the mixer by a chain H. This hoisting mechanism is supported on angles aa suspended from the timbers bb.

The lead of the rope is from the center sheave n over the upper sheaves nn' under the two outer sheaves am over the three upper sheaves n under the two guide sheaves n, and finally both ends are attached to the drum H. The guide sheaves n are sup ported on the ground frame 0.. In this ar-' rangement the center sheave n is only an is thrown in and the bucket starts on its upequaliaer, the hoisting being done by two tackles each consistin of ,a double upper sheave a single lower s cave and a four-part fall;

In operation, the material to be mixed is dum ed into the loading bucket 0 as it lies on t e ground, thus obviating the labor of elevating the material to the height ofthe feed spout a, and also dispensing with 'elevated 4 platforms and runways. Further 'more, one batch isbeing mixed in themixer while the'bucket 0 is being loaded, and by this means'the output of concrete is largely increased and the number of men employed in loading is decreased, as they can work constantly without waitmg forthe mixer tobe discharged. When the clutch of the hoist ward journey, the ull of the ropes is normal to the radius ars f and in the direct line of gravity. As the upward ,journey continues, the directions of the pull of the ropes inclines increasingly from the normal to the radius bars and from the line of gravity, but the line of efiort isalways a fair pull on the radius bars and-a fair 'pull against gravity, relieving the strain on the pivot pins 7". When the loading bucket reaches the. upward limit of its travel, the latch e strikes the edge of the feed spout a, releasing the gate d, allowing the batch of material to slide into the mixer from the bucket c. As the bucket is lowered by force of gravity, the swinging frame gg gradually assumes the upright position a'ain, and when the bucket strikes the floor, t 'e gate at snaps over the spring pressed latch e.

When it is necessary to move the mixer outfit, the upright frame 9; is lifted until the ivots p are clear of the brackets p. The ower ends of ggare then carried toward the left while the upper end with the sheaves n is lowered to the ri ht until the swing frame rests on the sill ame 00 andbucket c. The pivot pins 0 and f are then withmixer for elevating the bucket to the mixer spout.

2. A power charging device for concrete mixers, comprising ra ius arms pivoted 'at one end to.the lower frame of the mixer and. carrying a loading bucket rigidly attached to the other end, and hoisting means for tilting the arms upward until the loading bucket is over the mixer feed spout." I 3. A power chargin device for concrete mixers, comprisin ra. ius arms pivoted at one end to the mlxer frame and having a loading bucket rigidly attached to. the other ends, sheaves attached to the top of the bucket overhead sheaves on an upright frame and a flexible fconnector connecting said sheaves and a hoisting drum.

4. A power char device for concrete mixers, comprising ra ius arms pivoted at pne end and carrying a loading bucket at the otherf'an upright frame pivoted at the lower end and carrylng sheaves at the upper end, sheaves carried by. the loading'bucket, an enwhereby as the latter swing upus bars, ward, the former swings the normal the the top of the bucket, a ground supported 1 gagement between the upright frame and ra-,

a loading frame attached to the mixer, a hoisting frame pivoted on the ground frame and carrying overhead sheaves, guide sheaves near the Eivot of the hoisting frame and a continuous I oisting r0 e leadmg around the sheaves and having oth ends connected to the hoist- 5 ing drum.

6. A power charging device for concrete mixers, pivoted radius arms carrying a loading bucket having hoisting sheaves, a pivoted upright frame carrying hoisting sheaves 10 at the top, said radius arms and upright frame having a mutual engagement consist-,

ing of a projection on one an moving along the other as their relative positions change,

hoisting means and ropes connecting said means and sald sheaves.

EDW. W. 'ZINN, H, H. GERLAGH. 

